********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 7 September 2017 Vol. XXX No. 036 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = +0.3 seconds beginning 29 Jun 2017 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should be available by 20:00 UTC. * * * * We are currently not able to receive email at * * ser7@maia.usno.navy.mil. Questions and enquiries can now be * * directed to the following email account: navobsy_eop.fct@navy.mil * * * * Distribution statement A. Approved for public release: * * distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 17 9 1 57997 0.23559 .00009 0.35717 .00009 0.336310 0.000019 17 9 2 57998 0.23606 .00009 0.35509 .00009 0.336171 0.000018 17 9 3 57999 0.23680 .00009 0.35328 .00009 0.335990 0.000018 17 9 4 58000 0.23749 .00009 0.35167 .00009 0.335765 0.000017 17 9 5 58001 0.23798 .00009 0.35003 .00009 0.335385 0.000017 17 9 6 58002 0.23869 .00009 0.34817 .00009 0.334794 0.000016 17 9 7 58003 0.23989 .00009 0.34621 .00009 0.334022 0.000012 IERS Final Values MJD x y UT1-UTC " " s 17 7 2 57936 0.1590 0.4488 0.35896 17 7 3 57937 0.1623 0.4483 0.35848 17 7 4 57938 0.1657 0.4477 0.35811 17 7 5 57939 0.1690 0.4472 0.35785 17 7 6 57940 0.1720 0.4467 0.35768 17 7 7 57941 0.1750 0.4460 0.35759 17 7 8 57942 0.1778 0.4452 0.35753 17 7 9 57943 0.1802 0.4447 0.35748 17 7 10 57944 0.1820 0.4439 0.35737 17 7 11 57945 0.1838 0.4428 0.35716 17 7 12 57946 0.1852 0.4417 0.35680 17 7 13 57947 0.1871 0.4406 0.35632 17 7 14 57948 0.1894 0.4393 0.35576 17 7 15 57949 0.1912 0.4382 0.35515 17 7 16 57950 0.1923 0.4367 0.35453 17 7 17 57951 0.1935 0.4350 0.35393 17 7 18 57952 0.1947 0.4338 0.35337 17 7 19 57953 0.1959 0.4323 0.35287 17 7 20 57954 0.1971 0.4307 0.35244 17 7 21 57955 0.1979 0.4290 0.35209 17 7 22 57956 0.1986 0.4266 0.35181 17 7 23 57957 0.1999 0.4244 0.35155 17 7 24 57958 0.2018 0.4227 0.35123 17 7 25 57959 0.2034 0.4212 0.35078 17 7 26 57960 0.2048 0.4199 0.35020 17 7 27 57961 0.2061 0.4185 0.34953 17 7 28 57962 0.2071 0.4169 0.34882 17 7 29 57963 0.2077 0.4153 0.34814 17 7 30 57964 0.2083 0.4137 0.34752 17 7 31 57965 0.2088 0.4118 0.34702 17 8 1 57966 0.2098 0.4099 0.34665 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.1230 + 0.1482 cos A - 0.0026 sin A - 0.0362 cos C - 0.0083 sin C y = 0.3584 + 0.0037 cos A - 0.1333 sin A - 0.0083 cos C + 0.0362 sin C UT1-UTC = 0.2999 - 0.00110 (MJD - 58011) - (UT2-UT1) where A = 2*pi*(MJD-58003)/365.25 and C = 2*pi*(MJD-58003)/435. TAI-UTC(MJD 58004) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58003)**0.80 S t = 0.00025 (MJD-58003)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2017 9 8 58004 0.2409 0.3445 0.33313 2017 9 9 58005 0.2417 0.3428 0.33219 2017 9 10 58006 0.2422 0.3412 0.33125 2017 9 11 58007 0.2423 0.3396 0.33038 2017 9 12 58008 0.2422 0.3380 0.32962 2017 9 13 58009 0.2420 0.3363 0.32900 2017 9 14 58010 0.2417 0.3346 0.32848 2017 9 15 58011 0.2414 0.3328 0.32799 2017 9 16 58012 0.2411 0.3310 0.32747 2017 9 17 58013 0.2407 0.3293 0.32683 2017 9 18 58014 0.2402 0.3276 0.32604 2017 9 19 58015 0.2397 0.3259 0.32511 2017 9 20 58016 0.2391 0.3242 0.32408 2017 9 21 58017 0.2384 0.3225 0.32302 2017 9 22 58018 0.2378 0.3208 0.32198 2017 9 23 58019 0.2371 0.3191 0.32100 2017 9 24 58020 0.2363 0.3174 0.32012 2017 9 25 58021 0.2356 0.3157 0.31936 2017 9 26 58022 0.2349 0.3141 0.31871 2017 9 27 58023 0.2341 0.3124 0.31814 2017 9 28 58024 0.2333 0.3107 0.31761 2017 9 29 58025 0.2324 0.3091 0.31707 2017 9 30 58026 0.2315 0.3075 0.31648 2017 10 1 58027 0.2305 0.3059 0.31578 2017 10 2 58028 0.2295 0.3043 0.31493 2017 10 3 58029 0.2284 0.3027 0.31388 2017 10 4 58030 0.2273 0.3011 0.31264 2017 10 5 58031 0.2261 0.2996 0.31122 2017 10 6 58032 0.2249 0.2980 0.30966 2017 10 7 58033 0.2237 0.2965 0.30804 2017 10 8 58034 0.2225 0.2950 0.30645 2017 10 9 58035 0.2212 0.2935 0.30494 2017 10 10 58036 0.2199 0.2920 0.30354 2017 10 11 58037 0.2185 0.2906 0.30224 2017 10 12 58038 0.2171 0.2891 0.30100 2017 10 13 58039 0.2157 0.2877 0.29976 2017 10 14 58040 0.2143 0.2863 0.29845 2017 10 15 58041 0.2128 0.2849 0.29705 2017 10 16 58042 0.2114 0.2836 0.29553 2017 10 17 58043 0.2098 0.2822 0.29392 2017 10 18 58044 0.2083 0.2809 0.29225 2017 10 19 58045 0.2067 0.2796 0.29058 2017 10 20 58046 0.2051 0.2783 0.28895 2017 10 21 58047 0.2035 0.2770 0.28741 2017 10 22 58048 0.2019 0.2758 0.28598 2017 10 23 58049 0.2002 0.2746 0.28467 2017 10 24 58050 0.1985 0.2734 0.28346 2017 10 25 58051 0.1968 0.2722 0.28233 2017 10 26 58052 0.1950 0.2711 0.28123 2017 10 27 58053 0.1932 0.2700 0.28012 2017 10 28 58054 0.1914 0.2689 0.27895 2017 10 29 58055 0.1896 0.2678 0.27768 2017 10 30 58056 0.1878 0.2667 0.27628 2017 10 31 58057 0.1859 0.2657 0.27472 2017 11 1 58058 0.1841 0.2647 0.27300 2017 11 2 58059 0.1822 0.2638 0.27114 2017 11 3 58060 0.1803 0.2628 0.26921 2017 11 4 58061 0.1783 0.2619 0.26727 2017 11 5 58062 0.1764 0.2610 0.26542 2017 11 6 58063 0.1744 0.2602 0.26369 2017 11 7 58064 0.1724 0.2593 0.26209 2017 11 8 58065 0.1704 0.2585 0.26059 2017 11 9 58066 0.1684 0.2578 0.25913 2017 11 10 58067 0.1664 0.2570 0.25764 2017 11 11 58068 0.1643 0.2563 0.25608 2017 11 12 58069 0.1623 0.2556 0.25443 2017 11 13 58070 0.1602 0.2549 0.25272 2017 11 14 58071 0.1581 0.2543 0.25097 2017 11 15 58072 0.1560 0.2537 0.24922 2017 11 16 58073 0.1539 0.2531 0.24752 2017 11 17 58074 0.1518 0.2526 0.24592 2017 11 18 58075 0.1497 0.2521 0.24442 2017 11 19 58076 0.1475 0.2516 0.24306 2017 11 20 58077 0.1454 0.2512 0.24181 2017 11 21 58078 0.1432 0.2508 0.24065 2017 11 22 58079 0.1410 0.2504 0.23956 2017 11 23 58080 0.1389 0.2500 0.23849 2017 11 24 58081 0.1367 0.2497 0.23739 2017 11 25 58082 0.1345 0.2494 0.23622 2017 11 26 58083 0.1323 0.2491 0.23494 2017 11 27 58084 0.1301 0.2489 0.23352 2017 11 28 58085 0.1279 0.2487 0.23196 2017 11 29 58086 0.1257 0.2486 0.23025 2017 11 30 58087 0.1234 0.2484 0.22844 2017 12 1 58088 0.1212 0.2483 0.22660 2017 12 2 58089 0.1190 0.2483 0.22479 2017 12 3 58090 0.1168 0.2482 0.22310 2017 12 4 58091 0.1146 0.2482 0.22155 2017 12 5 58092 0.1123 0.2482 0.22014 2017 12 6 58093 0.1101 0.2483 0.21880 2017 12 7 58094 0.1079 0.2484 0.21747 2017 12 8 58095 0.1057 0.2485 0.21610 2017 12 9 58096 0.1034 0.2487 0.21465 2017 12 10 58097 0.1012 0.2489 0.21314 2017 12 11 58098 0.0990 0.2491 0.21161 2017 12 12 58099 0.0968 0.2493 0.21010 2017 12 13 58100 0.0946 0.2496 0.20864 2017 12 14 58101 0.0924 0.2500 0.20728 2017 12 15 58102 0.0902 0.2503 0.20605 2017 12 16 58103 0.0880 0.2507 0.20494 2017 12 17 58104 0.0858 0.2511 0.20396 2017 12 18 58105 0.0836 0.2515 0.20307 2017 12 19 58106 0.0814 0.2520 0.20227 2017 12 20 58107 0.0793 0.2525 0.20150 2017 12 21 58108 0.0771 0.2531 0.20072 2017 12 22 58109 0.0750 0.2537 0.19989 2017 12 23 58110 0.0728 0.2543 0.19898 2017 12 24 58111 0.0707 0.2549 0.19794 2017 12 25 58112 0.0686 0.2556 0.19679 2017 12 26 58113 0.0665 0.2563 0.19551 2017 12 27 58114 0.0644 0.2570 0.19412 2017 12 28 58115 0.0623 0.2578 0.19266 2017 12 29 58116 0.0602 0.2586 0.19120 2017 12 30 58117 0.0582 0.2594 0.18980 2017 12 31 58118 0.0561 0.2602 0.18850 2018 1 1 58119 0.0541 0.2611 0.18731 2018 1 2 58120 0.0521 0.2620 0.18620 2018 1 3 58121 0.0501 0.2630 0.18510 2018 1 4 58122 0.0481 0.2639 0.18394 2018 1 5 58123 0.0462 0.2649 0.18268 2018 1 6 58124 0.0442 0.2660 0.18132 2018 1 7 58125 0.0423 0.2670 0.17991 2018 1 8 58126 0.0404 0.2681 0.17849 2018 1 9 58127 0.0385 0.2692 0.17712 2018 1 10 58128 0.0367 0.2704 0.17584 2018 1 11 58129 0.0348 0.2715 0.17467 2018 1 12 58130 0.0330 0.2727 0.17363 2018 1 13 58131 0.0312 0.2740 0.17270 2018 1 14 58132 0.0294 0.2752 0.17188 2018 1 15 58133 0.0276 0.2765 0.17113 2018 1 16 58134 0.0259 0.2778 0.17040 2018 1 17 58135 0.0242 0.2791 0.16967 2018 1 18 58136 0.0225 0.2805 0.16889 2018 1 19 58137 0.0208 0.2819 0.16801 2018 1 20 58138 0.0192 0.2833 0.16700 2018 1 21 58139 0.0176 0.2847 0.16587 2018 1 22 58140 0.0160 0.2862 0.16460 2018 1 23 58141 0.0144 0.2876 0.16323 2018 1 24 58142 0.0129 0.2891 0.16179 2018 1 25 58143 0.0114 0.2907 0.16033 2018 1 26 58144 0.0099 0.2922 0.15890 2018 1 27 58145 0.0085 0.2938 0.15755 2018 1 28 58146 0.0070 0.2954 0.15628 2018 1 29 58147 0.0056 0.2970 0.15509 2018 1 30 58148 0.0043 0.2986 0.15391 2018 1 31 58149 0.0029 0.3003 0.15268 2018 2 1 58150 0.0016 0.3019 0.15134 2018 2 2 58151 0.0003 0.3036 0.14986 2018 2 3 58152 -0.0009 0.3053 0.14828 2018 2 4 58153 -0.0021 0.3071 0.14665 2018 2 5 58154 -0.0033 0.3088 0.14504 2018 2 6 58155 -0.0045 0.3106 0.14351 2018 2 7 58156 -0.0056 0.3124 0.14209 2018 2 8 58157 -0.0067 0.3142 0.14081 2018 2 9 58158 -0.0077 0.3160 0.13965 2018 2 10 58159 -0.0088 0.3178 0.13861 2018 2 11 58160 -0.0098 0.3197 0.13764 2018 2 12 58161 -0.0107 0.3216 0.13671 2018 2 13 58162 -0.0117 0.3234 0.13578 2018 2 14 58163 -0.0126 0.3253 0.13480 2018 2 15 58164 -0.0134 0.3272 0.13373 2018 2 16 58165 -0.0142 0.3292 0.13254 2018 2 17 58166 -0.0150 0.3311 0.13120 2018 2 18 58167 -0.0158 0.3330 0.12972 2018 2 19 58168 -0.0165 0.3350 0.12813 2018 2 20 58169 -0.0172 0.3370 0.12646 2018 2 21 58170 -0.0179 0.3390 0.12478 2018 2 22 58171 -0.0185 0.3409 0.12313 2018 2 23 58172 -0.0190 0.3430 0.12155 2018 2 24 58173 -0.0196 0.3450 0.12006 2018 2 25 58174 -0.0201 0.3470 0.11865 2018 2 26 58175 -0.0206 0.3490 0.11726 2018 2 27 58176 -0.0210 0.3510 0.11584 2018 2 28 58177 -0.0214 0.3531 0.11432 2018 3 1 58178 -0.0218 0.3551 0.11265 2018 3 2 58179 -0.0221 0.3572 0.11083 2018 3 3 58180 -0.0224 0.3593 0.10891 2018 3 4 58181 -0.0227 0.3613 0.10695 2018 3 5 58182 -0.0229 0.3634 0.10504 2018 3 6 58183 -0.0230 0.3655 0.10321 2018 3 7 58184 -0.0232 0.3676 0.10152 2018 3 8 58185 -0.0233 0.3696 0.09995 2018 3 9 58186 -0.0234 0.3717 0.09851 2018 3 10 58187 -0.0234 0.3738 0.09715 2018 3 11 58188 -0.0234 0.3759 0.09584 2018 3 12 58189 -0.0234 0.3780 0.09454 2018 3 13 58190 -0.0233 0.3801 0.09319 2018 3 14 58191 -0.0232 0.3822 0.09176 2018 3 15 58192 -0.0230 0.3842 0.09023 2018 3 16 58193 -0.0228 0.3863 0.08857 2018 3 17 58194 -0.0226 0.3884 0.08679 2018 3 18 58195 -0.0223 0.3905 0.08493 2018 3 19 58196 -0.0220 0.3926 0.08302 2018 3 20 58197 -0.0217 0.3946 0.08114 2018 3 21 58198 -0.0213 0.3967 0.07935 2018 3 22 58199 -0.0209 0.3988 0.07769 2018 3 23 58200 -0.0204 0.4008 0.07617 2018 3 24 58201 -0.0200 0.4029 0.07477 2018 3 25 58202 -0.0194 0.4050 0.07346 2018 3 26 58203 -0.0189 0.4070 0.07215 2018 3 27 58204 -0.0183 0.4090 0.07078 2018 3 28 58205 -0.0177 0.4111 0.06929 2018 3 29 58206 -0.0170 0.4131 0.06766 2018 3 30 58207 -0.0163 0.4151 0.06593 2018 3 31 58208 -0.0156 0.4171 0.06414 2018 4 1 58209 -0.0148 0.4191 0.06237 2018 4 2 58210 -0.0140 0.4211 0.06070 2018 4 3 58211 -0.0131 0.4230 0.05917 2018 4 4 58212 -0.0123 0.4250 0.05780 2018 4 5 58213 -0.0114 0.4269 0.05658 2018 4 6 58214 -0.0104 0.4289 0.05547 2018 4 7 58215 -0.0094 0.4308 0.05442 2018 4 8 58216 -0.0084 0.4327 0.05340 2018 4 9 58217 -0.0074 0.4346 0.05234 2018 4 10 58218 -0.0063 0.4365 0.05119 2018 4 11 58219 -0.0052 0.4383 0.04992 2018 4 12 58220 -0.0041 0.4402 0.04846 2018 4 13 58221 -0.0029 0.4420 0.04679 2018 4 14 58222 -0.0017 0.4438 0.04491 2018 4 15 58223 -0.0004 0.4456 0.04290 2018 4 16 58224 0.0008 0.4474 0.04084 2018 4 17 58225 0.0021 0.4492 0.03881 2018 4 18 58226 0.0035 0.4509 0.03688 2018 4 19 58227 0.0048 0.4526 0.03513 2018 4 20 58228 0.0062 0.4543 0.03355 2018 4 21 58229 0.0076 0.4560 0.03210 2018 4 22 58230 0.0091 0.4577 0.03073 2018 4 23 58231 0.0106 0.4594 0.02936 2018 4 24 58232 0.0121 0.4610 0.02790 2018 4 25 58233 0.0136 0.4626 0.02638 2018 4 26 58234 0.0152 0.4642 0.02478 2018 4 27 58235 0.0167 0.4657 0.02313 2018 4 28 58236 0.0184 0.4673 0.02149 2018 4 29 58237 0.0200 0.4688 0.01991 2018 4 30 58238 0.0217 0.4703 0.01846 2018 5 1 58239 0.0234 0.4718 0.01714 2018 5 2 58240 0.0251 0.4732 0.01596 2018 5 3 58241 0.0268 0.4746 0.01493 2018 5 4 58242 0.0286 0.4760 0.01400 2018 5 5 58243 0.0304 0.4774 0.01314 2018 5 6 58244 0.0322 0.4787 0.01228 2018 5 7 58245 0.0340 0.4801 0.01139 2018 5 8 58246 0.0359 0.4814 0.01043 2018 5 9 58247 0.0377 0.4826 0.00934 2018 5 10 58248 0.0396 0.4839 0.00813 2018 5 11 58249 0.0416 0.4851 0.00684 2018 5 12 58250 0.0435 0.4863 0.00547 2018 5 13 58251 0.0455 0.4874 0.00401 2018 5 14 58252 0.0474 0.4885 0.00251 2018 5 15 58253 0.0494 0.4897 0.00100 2018 5 16 58254 0.0514 0.4907 -0.00042 2018 5 17 58255 0.0535 0.4918 -0.00169 2018 5 18 58256 0.0555 0.4928 -0.00283 2018 5 19 58257 0.0576 0.4938 -0.00389 2018 5 20 58258 0.0597 0.4947 -0.00494 2018 5 21 58259 0.0618 0.4957 -0.00603 2018 5 22 58260 0.0639 0.4966 -0.00725 2018 5 23 58261 0.0660 0.4974 -0.00856 2018 5 24 58262 0.0681 0.4983 -0.00992 2018 5 25 58263 0.0703 0.4991 -0.01127 2018 5 26 58264 0.0725 0.4998 -0.01258 2018 5 27 58265 0.0746 0.5006 -0.01381 2018 5 28 58266 0.0768 0.5013 -0.01484 2018 5 29 58267 0.0790 0.5020 -0.01570 2018 5 30 58268 0.0812 0.5026 -0.01641 2018 5 31 58269 0.0834 0.5032 -0.01697 2018 6 1 58270 0.0857 0.5038 -0.01740 2018 6 2 58271 0.0879 0.5044 -0.01782 2018 6 3 58272 0.0901 0.5049 -0.01820 2018 6 4 58273 0.0924 0.5054 -0.01862 2018 6 5 58274 0.0946 0.5058 -0.01912 2018 6 6 58275 0.0969 0.5063 -0.01971 2018 6 7 58276 0.0992 0.5067 -0.02043 2018 6 8 58277 0.1014 0.5070 -0.02127 2018 6 9 58278 0.1037 0.5073 -0.02219 2018 6 10 58279 0.1060 0.5076 -0.02313 2018 6 11 58280 0.1083 0.5079 -0.02404 2018 6 12 58281 0.1105 0.5081 -0.02487 2018 6 13 58282 0.1128 0.5083 -0.02558 2018 6 14 58283 0.1151 0.5085 -0.02621 2018 6 15 58284 0.1174 0.5086 -0.02677 2018 6 16 58285 0.1197 0.5087 -0.02730 2018 6 17 58286 0.1220 0.5088 -0.02781 2018 6 18 58287 0.1242 0.5088 -0.02841 2018 6 19 58288 0.1265 0.5088 -0.02917 2018 6 20 58289 0.1288 0.5088 -0.03001 2018 6 21 58290 0.1311 0.5087 -0.03089 2018 6 22 58291 0.1334 0.5086 -0.03173 2018 6 23 58292 0.1356 0.5085 -0.03246 2018 6 24 58293 0.1379 0.5083 -0.03305 2018 6 25 58294 0.1401 0.5081 -0.03350 2018 6 26 58295 0.1424 0.5079 -0.03386 2018 6 27 58296 0.1446 0.5076 -0.03412 2018 6 28 58297 0.1469 0.5073 -0.03429 2018 6 29 58298 0.1491 0.5070 -0.03445 2018 6 30 58299 0.1513 0.5066 -0.03462 2018 7 1 58300 0.1535 0.5062 -0.03480 2018 7 2 58301 0.1557 0.5058 -0.03503 2018 7 3 58302 0.1579 0.5053 -0.03533 2018 7 4 58303 0.1601 0.5048 -0.03573 2018 7 5 58304 0.1623 0.5043 -0.03624 2018 7 6 58305 0.1644 0.5037 -0.03685 2018 7 7 58306 0.1666 0.5032 -0.03750 2018 7 8 58307 0.1687 0.5025 -0.03813 2018 7 9 58308 0.1708 0.5019 -0.03868 2018 7 10 58309 0.1729 0.5012 -0.03911 2018 7 11 58310 0.1750 0.5005 -0.03938 2018 7 12 58311 0.1771 0.4998 -0.03953 2018 7 13 58312 0.1791 0.4990 -0.03961 2018 7 14 58313 0.1812 0.4982 -0.03972 2018 7 15 58314 0.1832 0.4974 -0.03995 2018 7 16 58315 0.1852 0.4965 -0.04038 2018 7 17 58316 0.1872 0.4956 -0.04101 2018 7 18 58317 0.1892 0.4947 -0.04174 2018 7 19 58318 0.1911 0.4938 -0.04248 2018 7 20 58319 0.1930 0.4928 -0.04318 2018 7 21 58320 0.1949 0.4918 -0.04373 2018 7 22 58321 0.1968 0.4908 -0.04416 2018 7 23 58322 0.1987 0.4897 -0.04445 2018 7 24 58323 0.2005 0.4886 -0.04464 2018 7 25 58324 0.2024 0.4875 -0.04473 2018 7 26 58325 0.2042 0.4864 -0.04472 2018 7 27 58326 0.2060 0.4852 -0.04464 2018 7 28 58327 0.2077 0.4841 -0.04459 2018 7 29 58328 0.2094 0.4828 -0.04460 2018 7 30 58329 0.2111 0.4816 -0.04470 2018 7 31 58330 0.2128 0.4803 -0.04490 2018 8 1 58331 0.2145 0.4791 -0.04522 2018 8 2 58332 0.2161 0.4777 -0.04563 2018 8 3 58333 0.2177 0.4764 -0.04606 2018 8 4 58334 0.2193 0.4751 -0.04648 2018 8 5 58335 0.2209 0.4737 -0.04690 2018 8 6 58336 0.2224 0.4723 -0.04730 2018 8 7 58337 0.2239 0.4709 -0.04763 2018 8 8 58338 0.2254 0.4694 -0.04793 2018 8 9 58339 0.2268 0.4679 -0.04824 2018 8 10 58340 0.2282 0.4664 -0.04858 2018 8 11 58341 0.2296 0.4649 -0.04901 2018 8 12 58342 0.2310 0.4634 -0.04965 2018 8 13 58343 0.2323 0.4619 -0.05047 2018 8 14 58344 0.2336 0.4603 -0.05139 2018 8 15 58345 0.2348 0.4587 -0.05237 2018 8 16 58346 0.2361 0.4571 -0.05328 2018 8 17 58347 0.2373 0.4555 -0.05406 2018 8 18 58348 0.2384 0.4538 -0.05466 2018 8 19 58349 0.2396 0.4522 -0.05508 2018 8 20 58350 0.2407 0.4505 -0.05536 2018 8 21 58351 0.2418 0.4488 -0.05551 2018 8 22 58352 0.2428 0.4471 -0.05557 2018 8 23 58353 0.2438 0.4454 -0.05561 2018 8 24 58354 0.2448 0.4437 -0.05571 2018 8 25 58355 0.2458 0.4419 -0.05590 2018 8 26 58356 0.2467 0.4401 -0.05623 2018 8 27 58357 0.2476 0.4384 -0.05668 2018 8 28 58358 0.2484 0.4366 -0.05726 2018 8 29 58359 0.2492 0.4348 -0.05799 2018 8 30 58360 0.2500 0.4330 -0.05885 2018 8 31 58361 0.2507 0.4312 -0.05979 2018 9 1 58362 0.2514 0.4293 -0.06075 2018 9 2 58363 0.2521 0.4275 -0.06162 2018 9 3 58364 0.2528 0.4256 -0.06239 2018 9 4 58365 0.2534 0.4238 -0.06312 2018 9 5 58366 0.2539 0.4219 -0.06381 2018 9 6 58367 0.2545 0.4200 -0.06450 2018 9 7 58368 0.2550 0.4181 -0.06528 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 57981 -110.78 0.30 -12.23 0.02 57982 -111.17 0.30 -12.47 0.02 57983 -111.28 0.30 -12.69 0.02 57984 -111.08 0.30 -12.72 0.02 57985 -110.70 0.30 -12.52 0.02 57986 -110.28 0.30 -12.24 0.02 57987 -109.92 0.30 -12.09 0.15 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57936 -104.5 -12.5 57937 -104.4 -12.6 57938 -104.6 -12.6 57939 -105.0 -12.5 57940 -105.3 -12.4 57941 -105.4 -12.4 57942 -105.4 -12.5 57943 -105.4 -12.5 57944 -105.5 -12.4 57945 -105.6 -12.4 57946 -105.8 -12.5 57947 -106.0 -12.5 57948 -106.0 -12.4 57949 -106.0 -12.3 57950 -106.0 -12.1 57951 -106.3 -12.0 57952 -106.7 -12.0 57953 -107.3 -12.1 57954 -107.8 -12.4 57955 -108.2 -12.6 57956 -108.3 -12.7 57957 -108.1 -12.6 57958 -107.7 -12.4 57959 -107.3 -12.4 57960 -107.1 -12.4 57961 -107.3 -12.2 57962 -108.0 -12.2 57963 -108.5 -12.2 57964 -108.7 -12.2 57965 -108.7 -12.4 57966 -108.8 -12.5 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57981 0.083 0.119 0.132 0.020 57982 0.079 0.119 0.137 0.020 57983 0.085 0.119 0.153 0.020 57984 0.109 0.119 0.162 0.020 57985 0.144 0.119 0.164 0.020 57986 0.180 0.119 0.182 0.020 57987 0.210 0.119 0.212 0.150 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57936 0.03 0.10 57937 0.02 0.05 57938 0.02 0.02 57939 0.03 0.03 57940 0.05 0.07 57941 0.08 0.09 57942 0.09 0.04 57943 0.09 0.05 57944 0.07 0.13 57945 0.08 0.14 57946 0.07 0.07 57947 0.06 0.08 57948 0.08 0.10 57949 0.07 0.05 57950 0.10 0.09 57951 0.12 0.09 57952 0.17 0.10 57953 0.16 0.14 57954 0.14 0.12 57955 0.09 0.19 57956 0.07 0.14 57957 0.07 0.05 57958 0.08 0.04 57959 0.10 0.03 57960 0.15 0.17 57961 0.21 0.46 57962 0.18 0.40 57963 0.17 0.28 57964 0.15 0.27 57965 0.13 0.16 57966 0.11 0.13 The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).